Mrs. Childs invite you to purchase another microscope for science classes to be able to break students into smaller lab groups for more effective learning.

This National Optical brand model 131 microscope is designed to meet or exceed high school teaching requirements, is ruggedly-built, and includes all the standard teaching essentials, plus popular “student-proofing” features. Optical system has DIN widefield 10x eyepiece, locked on, with fully rotatable pointer. Objective lenses are 45mm DIN parfocal, achromatic, color-coded 4x, 10x and 40x giving you magnifications of 40, 100, and 400 power. Built-in illuminator base has a 115V 20 watt bulb, heavy cord and light switch. Has both coarse focus and fine focus knobs. The slip clutch prevents damage to slides and objective lenses. Large 10mm x 120mm stage is acid and reagent resistant. The stage has a built-in condenser lens, and 5 hole disc diaphragm. Stage clips are locked on and spring mounted for ease of use. Overall the microscope is 13 3/4” high; the base is 5”x7 1/2”. Weighs 7 lbs. This is a high quality scope and deserves its popularity.